Blinking green screen in hybrid mode (but not in debug mode)

Physics
#1

When I visualize my game in hybrid mode (not in debug mode) the screen blinks in green at random times. I have no off screen or invisible physics objects that could interfere.  Does anyone know why I am observing this behaviour?

First time I observe this behaviour in my game, so I am worried that something is wrong with my physics behind the scenes.  I have recently migrated to newest Corona public build but equally I had not run my game in hybrid mode for a long time before changing Corona version.

Any hint or clue is appreciated.

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PS: Note to Corona admins.  It used to be very simple to “google through” forums threads and specific posts in search for answers.  Since you have changed the forums, Google indexation of threads and answers is not that good anymore.  I thought I had seen a thread covering this topic in the past and cannot locate it again.

#2

Have you tried the forum search?  It’s pretty good at finding threads now.

#3

That is what i do in fact, it is the only way to find something; but I could not in this case.  Still there is value in google for non native English speakers (“did you mean XYZ?”) and sometimes you think that the answer was in a Corona forum but was instead in Stack Overflow…

But minor point really: more interested in the blinking green background in physics hybrid mode.  It is not affecting my game but I am being paranoid.

#4

Have you tried the forum search?  It’s pretty good at finding threads now.

#5

That is what i do in fact, it is the only way to find something; but I could not in this case.  Still there is value in google for non native English speakers (“did you mean XYZ?”) and sometimes you think that the answer was in a Corona forum but was instead in Stack Overflow…

But minor point really: more interested in the blinking green background in physics hybrid mode.  It is not affecting my game but I am being paranoid.